<!DOCTYPE html>
<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
<style>
  @page {
    size: 600px 300px;
    margin: 30px;
  }
  body {
    margin: 0;
    background: cyan;
  }
</style>
The page margins should be the same on every side (30px).<br>
There's a 30px square in the bottom right corner.
<div style="position:fixed; right:0; bottom:0; width:30px; height:30px; background:hotpink;"></div>
<div style="break-before:page;">
  Same on the second page.
</div>
